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[ISN] Worm outbreak downs Chicago highway department network for two weeks
By John E Dunn
28 July 2013
A malware outbreak that downed the entire network of the highways agency
serving the city of Chicago for two weeks last month was probably caused
by a single employee or infected USB stick, a local TV station has
The June “virus” attack eventually affected 200 PCs, disrupting the
network for Cook County Department of Highway and Transportation, one of
the US’s largest urban counties comprising 130 Chicago municipalities and
over 5 million people.
As the malware rapidly spread through its downtown HQ, the agency's IT
team was forced to pull the plug for nine working days, temporarily
sending the workforce hack to calculators, fax machines, pens and paper
before a neighbouring County took pity and lent them some clean PCs.
The cause of the outbreak has not been identified but officials reportedly
said they were working on the theory that an external USB drive was to
blame. Such drives were not currently blocked.
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